TaxNo: 5672Genus Cheiloceras
| Suborder: |
Tornoceratina
|
| Superfamily: |
Dimeroceratoidea
|
| Family: |
Cheiloceratidae
|
| Genus: | Cheiloceras |
| Qualifier: | ge |
| Author: |
Frech 1897,p.125
|
| Lower Boundary: |
UD2A--UD2B:(verneuili Zone base) [07,75], 374 million years
|
| Upper Boundary: |
UD4A--UD4B: dunkeri Zone base [15,55], 366.8 million years
|